811264897 has 4 divisors (see below), whose sum is σ = 811470676. Its totient is φ = 811059120.

The previous prime is 811264859. The next prime is 811264921. The reversal of 811264897 is 798462118.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18054001 + 793210896 = 4249^2 + 28164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811264897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (811264397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96858 + ... + 104899.

It is an arithmetic number, because the mean of its divisors is an integer number (202867669).

Almost surely, 2^811264897 is an apocalyptic number.

It is an amenable number.

811264897 is a deficient number, since it is larger than the sum of its proper divisors (205779).

811264897 is a wasteful number, since it uses less digits than its factorization.

811264897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205778.

The product of its digits is 193536, while the sum is 46.

The square root of 811264897 is about 28482.7122479584. The cubic root of 811264897 is about 932.6547252404.

The spelling of 811264897 in words is "eight hundred eleven million, two hundred sixty-four thousand, eight hundred ninety-seven".